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The best coagulant for the precipitation...

The best coagulant for the precipitation of `Fe(OH)_3` sol is

A

`Na_2HPO_3`

B

`NaNO_3`

C

`Na_3PO_4`

D

`Na_2SO_4`

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MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
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  4. Which is correct about physical adsorption ?

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  16. Point out the false statement.

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